Turn On/Off Cleartype
Clear Type is enabled by default on Windows Vista. Originally the type face was used to visually improve information on a laptop LCD screen. While clear type was also available in Windows XP, in XP, it was not enabled by default.
Personally, even on a desktop PC i find clear type quite sharp. However, some people may not like clear type so here is a way to disable (or enable it after you have disabled it)
1/ Right click on a vacant part of your desktop
2/ From the drop down menu that appears, Click Personalize
3/ in The Personalize window, Click the Windows Color and Appearance option
4/ In the color and appearance window, Click the 'open classic appearance properties for more color' option
5/ In the classic appearance properties window, Press the Effects button
6/ A small effects window will now appear
7/ Under the 'use the following method to smooth edges of screen fonts' section you will see an option box
8/ Click the arrow to the Right of the box and select either 'standard' or 'cleartype' depending upon which you require
9/Next click OK followed by OK again to close the classic appearance setting window
10/ Finally Close the personalization window